TPS54227

4.5V 至 18V 输入、2A 同步降压转换器

The device is an adaptive ON-time D-CAP2 mode synchronous buck converter. The TPS54227 enables system designers to complete the bus regulators for a suite of various end equipment with a cost-effective, low component count, low standby current solution. The main control loop for the TPS54227 uses the D-CAP2 mode control which provides a fast transient response with no external compensation components. The TPS54227 also has a proprietary circuit that enables the device to adopt to both low equivalent series resistance ESR output capacitors, such as POSCAP or SP-CAP, and ultra-low ESR ceramic capacitors. The device operates from 4.5-V to 18-V VIN input. The output voltage can be programmed between 0.76 V and 7 V. The device also features an adjustable soft-start time. The TPS54227 is available in the 8-pin HSOP package and 10-pin VSON, and is designed to operate from –40°C to 85°C.

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D-CAP2™ Mode Enables Fast Transient

Response

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Low Output Ripple and Allows Ceramic Output

Capacitor

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Wide VIN Input Voltage Range: 4.5 V to 18 V

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Output Voltage Range: 0.76 V to 7 V

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Highly-Efficient Integrated FETs Optimized

for Lower Duty Cycle Applications

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155 mΩ High-Side and 108 mΩ Low-Side

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High Efficiency, Less Than 10 µA at Shutdown

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High Initial Bandgap Reference Accuracy

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Adjustable Soft-Start

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Prebiased Soft-Start

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700-kHz Switching Frequency fSW

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Cycle-By-Cycle Overcurrent Limit